I stand corrected on HEXDIG case-sensitivity. Thanks everyone.
Sorry to take up bandwidth on it.
One other issue that I ran across in URI processing is that the
grammar allows an absolute-URI to have an empty path
(empty hier-part), meaning that http: and http:?x are
acceptable absolute-URIs.
absolute-URI = scheme ":" ( hier-part / opaque-part )
hier-part = [ net-path / abs-path ] [ "?" query ]
Possibly these forms could be useful as some form of
relative URI, but I don't see them as absolute URIs. Even as
relative URIs, they seem dubious.
On Wednesday 07 May 2003 9:51 am, Chris Newman wrote:
> I concur with Paul's interpretation. The intent of the ABNF spec is that
> anything enclosed in double-quotes is case-insensitive.
>
> Note that there is no such thing as a reference implementation of ABNF,
> only the ABNF specification is normative.
>
> The ABNF validator referenced by <http://www.ietf.org/ID-nits.html> is
> available at http://www.apps.ietf.org/abnf.html and it does permit
> lower-case hex.
>
> - Chris